Have you ever peacefully gone for a swim in calm, warm, shallow waters… and been stung by a jellyfish without even seeing it? Now, researchers may have finally solved the mystery — and revealed yet ...

Jellyfish are a highly diverse group of aquatic animals. Their diameters range from 1 mm to over 1 m. Most have long tentacles, in some cases reaching more than 10 m in length. They come in a wide ...